[F] 415.11 Group H-5
Exception: The quantity limitations for any hazard category in Table 4184.108.40.206.1 shall not apply where the fabrication area contains quantities of hazardous materials not exceeding the maximum allowable quantities per control area established by Tables 307.1(1) and 307.1(2).
(pounds per square foot)
(gallons per square foot)
(cubic feet @ NTP/square foot)
|Combustible dust||Note b||Not Applicable||Not Applicable|
|Combustible fiber||Loose||Note b||Not Applicable||Not Applicable|
|Baled||Notes b and c|
|Combustible liquid||II||Not Applicable||0.01||Not Applicable|
|Combination Class||I, II and IIIA||0.04|
|Cryogenic gas||Flammable||Not Applicable||Not Applicable||Note d|
|Explosives||Note b||Note b||Note b|
|Flammable gas||Gaseous||Not Applicable||Not Applicable||Note d|
|Flammable liquid||IA||Not Applicable||0.0025||Not Applicable|
|Combination Class||IA, IB and IC||0.025|
|Combination Class||I, II and IIIA||0.04|
|Flammable solid||0.001||Not Applicable||Not Applicable|
|Organic peroxide||Unclassified detonable||Note b||Not Applicable||Not Applicable|
|Class I||Note b|
|Class IV||Not Limited|
|Class V||Not Limited|
|Oxidizing gas||Gaseous||Not Applicable||Not Applicable||1.25|
|Combination of gaseous and liquefied||1.25|
|Oxidizer||Class 4||Note b||Note b||Not Applicable|
|Combination Class||1, 2, 3||0.003||0.03|
|Pyrophoric materials||0.01||0.00125||Notes d and e|
|Unstable (reactive)||Class 4||Note b||Note b||Note b|
|Class 3||0.025||0.0025||Note b|
|Class 2||0.1||0.01||Note b|
|Class 1||Not Limited||Not Limited||Not Limited|
|Water reactive||Class 3||Note b||0.00125||Not Applicable|
|Class 1||Not Limited||Not Limited|
|Corrosives||Not Limited||Not Limited||Not Limited|
|Highly toxic||Not Limited||Not Limited||Note d|
|Toxics||Not Limited||Not Limited||Note d|
For SI: 1 pound per square foot = 4.882 kg/m2, 1 gallon per square foot = 40.7 L/m2, 1 cubic foot @ NTP/square foot = 0.305 m3 @ NTP/m2, 1 cubic foot = 0.02832 m3.
- Hazardous materials within piping shall not be included in the calculated quantities.
- Quantity of hazardous materials in a single fabrication shall not exceed the maximum allowable quantities per control area in Tables 307.1(1) and 307.1(2).
- Densely packed baled cotton that complies with the packing requirements of ISO 8115 shall not be included in this material class.
- The aggregate quantity of flammable, pyrophoric, toxic and highly toxic gases shall not exceed the greater of 0.2 cubic feet at NTP/square foot or 9,000 cubic feet at NTP.
- The aggregate quantity of pyrophoric gases in the building shall not exceed the amounts set forth in Table 415.6.2.
Fabrication areas, whose sizes are limited by the quantity of hazardous materials allowed by Table 4220.127.116.11.1, shall be separated from each other, from corridors and from other parts of the building by not less than 1-hour fire barriers constructed in accordance with Section 707 or horizontal assemblies constructed in accordance with Section 711, or both.
- Doors within such fire barrier walls, including doors to corridors, shall be only self-closing fire door assemblies having a fire protection rating of not less than 3/4 hour.
- Windows between fabrication areas and corridors are permitted to be fixed glazing listed and labeled for a fire protection rating of not less than 3/4 hour in accordance with Section 716.
Except for surfacing, floors within fabrication areas shall be of noncombustible construction.
Openings through floors of fabrication areas are permitted to be unprotected where the interconnected levels are used solely for mechanical equipment directly related to such fabrication areas (see Section 418.104.22.168).
Floors forming a part of an occupancy separation shall be liquid tight.
Mechanical exhaust ventilation at the rate of not less than 1 cubic foot per minute per square foot [0.0051 m3/(s • m2)] of floor area shall be provided throughout the portions of the fabrication area where HPM are used or stored. The exhaust air duct system of one fabrication area shall not connect to another duct system outside that fabrication area within the building.
Two or more operations at a workstation shall not be connected to the same exhaust system where either one or the combination of the substances removed could constitute a fire, explosion or hazardous chemical reaction within the exhaust duct system.
Exhaust ducts penetrating fire barriers constructed in accordance with Section 707 or horizontal assemblies constructed in accordance with Section 711 shall be contained in a shaft of equivalent fire-resistance-rated construction. Exhaust ducts shall not penetrate fire walls.
Fire dampers shall not be installed in exhaust ducts.
Corridors shall comply with Chapter 10 and shall be separated from fabrication areas as specified in Section 422.214.171.124. Corridors shall not contain HPM and shall not be used for transporting such materials except through closed piping systems as provided in Section 4126.96.36.199.
- Nonproduction HPM is allowed to be transported in corridors if utilized for maintenance, lab work and testing.
- Where existing fabrication areas are altered or modified, HPM is allowed to be transported in existing corridors, subject to the following conditions:
- Corridors. Corridors adjacent to the fabrication area where the alteration work is to be done shall comply with Section 1020 for a length determined as follows:
- Emergency alarm system. There shall be an emergency telephone system, a local manual alarm station or other approved alarm-initiating device within corridors at not more than 150-foot (45 720 mm) intervals and at each exit and doorway. The signal shall be relayed to an approved central, proprietary or remote station service or the emergency control station and shall initiate a local audible alarm.
- Pass-throughs. Self-closing doors having a fire protection rating of not less than 1 hour shall separate pass-throughs from existing corridors. Pass-throughs shall be constructed as required for the corridors and protected by an approved automatic sprinkler system.
Liquid storage rooms shall be constructed in accordance with the following requirements:
- Rooms greater than 500 square feet (46.5 m2) in area, shall have not fewer than one exterior door approved for fire department access.
- Rooms shall be separated from other areas by fire barriers constructed in accordance with Section 707 or horizontal assemblies constructed in accordance with Section 711, or both. The fire-resistance rating shall be not less than 1 hour for rooms up to 150 square feet (13.9 m2) in area and not less than 2 hours where the room is more than 150 square feet (13.9 m2) in area.
- Shelving, racks and wainscotting in such areas shall be of noncombustible construction or wood of not less than 1-inch (25 mm) nominal thickness or fire-retardant-treated wood complying with Section 2303.2.
- Rooms used for the storage of Class I flammable liquids shall not be located in a basement.